This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The first declared National Monument in the United States.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Most-visited and most-photographed slot canyon in the American Southwest.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

The largest island on the great salt lake is home to curious creatures and strange stories.

Visitors to this library are in for a real-world education in modernist architecture.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Largest man-made excavation on earth!

Step into the cool deep past and unknown future of who begat who.

This geothermal hot spring hides beneath a slowly growing mineral dome.

A small flooded ghost town with a few scattered structures remaining.

Despite sitting firmly in the global cradle of the Church of Jesus Christ of Latter-day Saints, this Hare Krishna temple is host to one of the largest color festivals outside India.

In the heart of Brigham Young's promised land sits a festering plot of industrial ruin that has been claimed by society's outcasts.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

The private island of Yale's elite Skull & Bones society is kind of a dump.